我需要从 Linux 中的 PHP 脚本调用 Swing Java 应用程序。Java应用程序使用swing但它的主框架是不可见的,所以在设置DISPLAY env之后。变量我能够从 tty2 运行它(从没有 x11 的终端)。问题是我不能从 PHP 脚本做同样的事情。我使用以下代码段:
$sys = system("export DISPLAY=:0.0", $output);
$sys = system("java -jar scheduler.jar -i7.txt -q2 -a6 -s -e ", $output);
我在 /var/log/apache2/error.log 中得到以下信息:
Exception in thread "main" java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
at java.awt.Window.<init>(Window.java:432)
at java.awt.Frame.<init>(Frame.java:403)
at java.awt.Frame.<init>(Frame.java:368)
at javax.swing.JFrame.<init>(JFrame.java:158)
at net.sukharevd.cssw.scheduler.view.AppFrame.<init>(AppFrame.java:51)
at net.sukharevd.cssw.scheduler.Main.main(Main.java:11)
我还尝试在 -Djava.awt.headless=true 之后添加参数java
,但没有成功:
Exception in thread "main" java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
at java.awt.Window.<init>(Window.java:432)
at java.awt.Frame.<init>(Frame.java:403)
at java.awt.Frame.<init>(Frame.java:368)
at javax.swing.JFrame.<init>(JFrame.java:158)
at net.sukharevd.cssw.scheduler.view.AppFrame.<init>(AppFrame.java:51)
at net.sukharevd.cssw.scheduler.Main.main(Main.java:11)
帮助我以正确的方式从 PHP 执行 Java 应用程序。